For the Sunshine Coast Queensland Australia, the recorded 4 year average local background radiation level was 0.10 uSv/hr before the Fukushina Nuclear disaster , see historical chart at bottom of page.
Once the Gammascout Alert Geiger counter recorded 24 hr 60 second logged data, of the day has been downloaded, it is analyzed and then posted here the next morning. At times significant peaks in radiation maybe detected which would warrant the issuing of a cautionary email advisory or an alert. To be placed on the radiation advisory alert list simply click on email@example.com, address, and send. Please take the time to read any email advisory or alert, and come back to this web site during the day for further updates. This site was created in response to these free air radiation cloud detections in Australia, and New Zealand.
This short animation of Northern, and Southern Hemisphere air circulation, shows why we can get detections so far south.
Liposomal Vitamin C
An Oncologist in Japan has been doing ongoing research on the Fukushima Nuclear Disaster site workers, and has found he is getting very good results with Liposomal Vitamin C. It appears to be healing a lot of radiation damage to their bodies. Liposomal Vitamin C is a combination of vitamin C and lecithin. This combination seems to improve the up take of vitamin C by 80%! It maybe a good idea for you and your family to research taking this to fortify against the effects of these radiation clouds coming through. He has been trying to encourage the Japanese government to educate their people about this treatment. http://www.youtube.com/watch?v=Rbm_MH3nSdM&feature=channel&list=UL
Making your own Liposomal Vitamin C, http://www.youtube.com/watch?v=F2eqfiTxDwg&feature=related
Podcast on Green Planet FM regarding Fukushima crisis, radiation survival.
Interview with Marco Kaltofen on how radiation spread via airborne dust particles from Fukushima. That Pacific Seafood, and food should be tested in North America and Internationally. https://www.youtube.com/watch?v=Z5eZvCOL_Ho&feature=youtube_gdata_player
This interview provides deep insights into the seriousness of the Fukushima Nuclear disaster, and Tepco’s management mind set.
A New Australian Live Radiation Monitoring station has been set up for Grovedale Victoria, on the Australian Live Monitoring site, http://sccc.org.au/monitoring/sunshinecoast-monitoring-station.html
Former Prime Minister of Japan Naoto KAN, and the Fukushima Nuclear Disaster http://vimeo.com/61465640
Recorded local background radiation levels
|Alert Codes?||Monthly Trend||Last 24 hour Trend||Free Guides||Tools|
|Average to slightly elevated||30% above average for November 2013 Detailed Monthly Reports||40% above the 0.1 uSv/hr pre Fukushima 4 year average||Free Geiger Counter Use Guide||Live Monitoring Stations|
|40% + above average||52% above average for January 2013.||Rain Alerts issued November, September, May, and January 2013, see more information below.||Free guide for DIY food testing lab||Local Weather Radar|
|80% + above average||Monthly average charts for 2012 & 2013, The 2012 year average was 21% above average.||Advisories issued for 27th, 17th November, & the 11th October 2012, see below for more information.||Radio Interviews,
2: Survival+1: Crisis
|Cloud flow Animation|
|120% + above average||Local news paper article on first detection in January 2012||Local email advisory issued for 20th and 13th July and the 5th March 2012, see below for more information.||Health and Environmental effects of technology||Latest Solar Storm Info|
|160% + above Average||“The Food Lab”, for the latest International reports of radioactive food contamination.||Latest Earthquake Info|
Daily average local background radiation levels by day and month for 2013
Detections have been made all over the world, these reports are local detections for Australia and New Zealand. “Is then, the whole of Australia also contaminated with radiation?” No!
A lot of these detections reported for Australia are very localized. Even with a recent record day average of 0.213 uSv/hr, which is 113% above our average local background, is still lower than a lot of places in the world. It much lower than the USA national average of 0.34 uSv/hr, and lower than the world average of 0.23 uSv/hr.
What the increasing day average detections here do indicate, is that our local background radiation level is increasing. Our traditional lower levels lets us detect small changes. So far most of the increases here, seem to be increasing Radon levels in the atmosphere. The dynamic is changing so constant testing is continuing. Read the October 2012 monthly report here, for a couple theories on why Radon levels may be increasing.
Here is a theory put forward by the people running the Nimbin monitoring Station, for the large Radon washout events detected in the Nimbin and Mullumbimby areas in late January 2013. The area had been in a dry period, and the underground aquifers were low. A flooding rain event came through and quickly forced a large amount of radioactive Radon gas into the atmosphere, that had built up during the dry period, in the aquifer layers.
The Radon daughter isotopes were then washed out of the atmosphere during the rain event, and detected on the rain swabs. It is not uncommon to get large radon washout events happening anywhere in the world during rain events. Radon gas is in the air we breath all the time, in small amounts. It decays to radioactive Lead Pb-214, Bismuth Bi-214 and Polonium Po-214. Radon daughter isotopes decay very quickly. Even so, in an event like this, with such high multi uSv/hr levels of detection, it would advisable to stay out of the rain. Much larger events like this have also been happening in Brazil, Video by Chris Busby http://www.youtube.com/watch?feature=player_embedded&v=PoJb4CTPauA See the early May, late January and early February 2013, reports below.
We haven’t seen any studies on the heath effects of being exposed to large Radon washout events. It is only a suggestion to take those precautions in the Rain Alert emails. Why is the east coast of Northern New South Wales is getting such large radon washout events? We have some theories, but don’t really know. Here is a link to more information on Radon. http://hyperphysics.phy-astr.gsu.edu/hbase/nuclear/radon.html
Alert October 12th December 2013 - For past two days the local background here has risen to the first alert level, set by the station operator. By the rain testing done at this location this indicates more than average airborne radioactive Radon gas in the atmosphere, coming from the tropics. The Sun is quiet at present, and there is no significant solar activity occurring. The station is very close to sea level and sub tropical, so most solar flares do not generally cause any appreciable increase in background here. Here are a couple theories for the increased Radon levels in the Atmosphere.
(Click on charts to see larger version)
November 2013 (30% above average)
Alert Caloundra 24th November 2013 - On the 23rd it was 46% above the 4 year pre Fukushima day average for this location. What do these local alert levels mean, and how are they determined ? These alert levels are set by the station operator, and are not based on any government alert level. It is suggested that during these periods of elevated free air background radiation detections, it would be wise to stay out of the rain. Here you will find local rain tests results explained in detail, plus why it is suggested to stay out of the rain during these elevated detection events. Large cloud masses where flowing from the tropics from around Darwin to the East Coast of Australia, during this period.
(Click on charts to see larger version)
October 2013 (25% above average)
North Island New Zealand report update - All the evidence is suggesting that the recent Blackcatsystems detection was genuine.
From a contact on the North Island of New Zealand.
“I had usually high readings averaging 0.47 micro SV yesterday 28th” They had just arrived back from overseas. It was located at One Tree Hill (which is a former Volcano in Auckland), it was there all day. No Cel Phones in vicinity…” This person is using a Gamma Scout Geiger counter.
This was from another contact of theirs.
“Contacted one other here in North Island around Auckland and they also noted unusually high readings (they knew something was up) the past three
days but today its back to normal current background.”
North Island New Zealand 26th and 27th - Can’t confirm if it is a station malfunction, or a genuine elevated detection. This North Island New Zealand monitoring station had elevated detections on Blackcatsystems on the 26th and 27th. The monitoring station has since been taken down by Blackcatsystems. During this event two other private monitoring stations, located on the North Island of New Zealand, did not show any significant elevation in background radiation levels.
Still elevated on the 27th,
This air flow picture shows the air mass which passed over my location, on the central east coast of Australia on the 24th, hit the North Island of new Zealand on the 25th / 26th.
Caloundra 25th October 2013 - Yesterday’s day average was 38% above the 4 year pre Fukushima day average. It is dry and windy here at present, so this is a free air detection increase, not a radon washout event. It is suggested that if it does rain, to stay out of it.
North Island New Zealand 12th October 2013 - Significant background increase detected on the Kapiti gaigakaunta private monitoring station.
(Click on charts to see larger version)
September 2013 (15% above average)
Dunedin New Zealand report 21st September 2013 - For the last 3 weeks, the ionisation chamber has been elevated – and is sitting in the 1.8 to 2.3 picoCurie per litre range. Normal is 0.3-0.5 … max. The GS is stil 0.17 to 0.18 microSieverts per hour (resident and stable) … and the SBM-20′s have been tripping through 60 CPM … which shows something is floating about. Waiting for it to break 70 CPM. Again, my flat is better sealed, so most isn’t coming in … however … I have a strong feeling that I trust my Radon Siren. It ‘sees things coming’ as it were. Cheap, simple, and works. Suited for radon daughters, and appears to work well for … Fukushima. Shall investigate ionization chamber construction in future.
NOTE: Scintillator testing of the rain swab collected on the 18th September at Caloundra, is indicating the presence of a Zeolite type material. A source of this could be volcanic ash. When testing is complete, the full report will be posted here. Here is the Geiger counter test chart for the rain swab. The scintillator test chart will be provided soon. Preliminary analysis also indicates the presence of trace amounts of Iodine I-129 and Lead Pb-210. Here is the completed Alert Rain Event Report.
Alert Caloundra report 17th September 2013 – Storms overnight here, so took rain swab off car this morning. On testing it peaked at approximately 6 uSv/hr (1800 cpm) using two Russian SBM-20 tubes and Theremino Geiger kit. Again it is suggested to stay out of the rain. This rain sample is decaying quickly which suggests it is a large radon washout. Geiger counter test chart
Alert Nimbin Monitoring Station report 16th September 2013 – Nimbin is located on the east coast of northern New South Wales Australia.
“…Rain began this morning…. drove to town about midday, got home about 30min ago and sat my SBT 10 on the roof of the car, as I gathered my things out of the back seat, and it started beeping. It was reading 0.38uSv/h….moments later I took a swab off the whole car roof (small sedan) and put it to my LND 7317 and got ~6500CPM for the first few minutes. I’ll send a photo and chart soon….” Here is the decay chart and detection photo.
We haven’t seen any studies on the heath effects of being exposed to large Radon washout events like this. It is only a suggestion to take these precautions in the Rain Alert emails. If you live in the area, it is suggested to stay out of the rain during these events, plus keep children and pets out of it also. If you do get wet, have a good shower. It maybe a very large radon washout event, that seems to be common to the Nimbin area. This rain washout could also have other isotopes in it. Without further testing with better equipment, there is no way of knowing.
Caloundra Australia 10th September - Small day average spike in background radiation levels here on the 10th September.
August 2013 (8% above average)
Caloundra Australia 14th August 2013 - The first half of this month has seen a steady increase in background radiation levels, compared to July.
Dunedin New Zealand 14th August 2013 – “Yes, spikes here … had a few 70 CPM and the curious thing is an increase to 1.2 picoCuries per litre this morning from 0.8 picoCuries … which is the normal average. Something is blowing in the wind.”
Dunedin New Zealand 7th August 2013 – Increase in background levels “GS (Gamma Scout) indicated 0.17 to 0.18 micros per hour … much better than some of the higher readings last year, air content 0.8 picoCuries per litre”
(Click on charts to see larger version)
July 2013 (6% above average)
Dunedin New Zealand 30th July 2013 – “Just had some 60 and 70 CPM readings … interesting. Normal background is 30-56 CPM … NW airflow from Australia coming over. Background increased from 0.8 to 1.4 picoCuries per litre and climbing. Air direction from Sydney …”
Dunedin New Zealand 1st July 2013 – “Curious … Just did a rain swab here …. we’ve got Radon – but from where? Wind is coming from Australia …. 100 CPM from a 0.25 m^2 swab in lite rain … Current ionization reading 1.5 picoCuries per litre and climbing …. hot wind …”
June 2013 (7% above average)
Nimbin Monthly report for June 2013 – Here is the Nimbin background radiation chart for June showing day averages from three different monitors – Orange is gamma only, green is GammaScout and blue LND 712. Nimbin day average chart for June 2013.
Dunedin New Zealand 19th June 2013 - “getting some 60+CPM readings on the SBMs for the first time in ages…. as this southerly approaches – had a big northerly tropic cyclone hit NZ with lots of rain …. so it is pushing up the remnants back on us …..
Spikes in background radiation also showing up on the North Island of New Zealand Kapiti gaigakaunta monitoring station also.
Got some rather nasty count rates from the rain recently in the 100+ CPM from near the window one night recently …. Suspect northerly air flows from the Pacific are contaminated.”
Caloundra rain swab test chart 9th June 2013 - Here is a test chart of a rain swab of a local car, that shows a small Radon washout event.
Nimbin report on the 9th June 2013 – “Bit of a wave blew through yesterday around midday, See the attached chart/s – The top chart is the three monitors here over the last 14 days and the bottom chart is CPM for 2xSi180g over 24hrs(8am-8am). All three counters recorded the wave. Drizzle and light showers all day…. Swab taken off the car earlier in the day yielded 2300cpm w/LND 7317 – the swab still showing activity now.
Rain water test 2nd June 2013 - May be a detection of Iodine I-129 from the tin roof down pipe polyester filter. It is not conclusive. Rain water was passing through this polyester filter off a 36 sqm tin roof at a location Sunshine Coast. If it is, it is still a very small detection of I-129, because the filter was in place for all of May. Mind you, not all of it would have been captured using this filter system. Lots of Beryllium Be-7 is also present! If I-129 is present in this Southern Hemisphere test, it would suggest that there is a lot more in the rain in the Northern Hemisphere!
For background on this subject read this article on using Be-7 as a tracer for I-129.
There is a natural Beryllium Be-7 and Lead Pb-210 cycle here in the Southern Hemisphere. There is more Beryllium Be-7 and Lead Pb-210, detected in rain washouts, during summer than in winter. This appears to be above average detection of Beryllium Be-7, and Lead Pb-210 in this test for May 2013.
Be-7 is produced by cosmic ray spallation in the upper atmosphere. The Sun had been relatively quite during May 2013. It takes around two weeks to reach sea level. It is my understanding that the Japanese have been pumping large amounts of liquid Nitrogen onto the multiple molten coriums at the Fukushima Nuclear disaster, to cool them down. The neutron bombardment, plus lots of underground corium venting, has also been releasing large amounts Beryllium Be-7 and 1-129.
Test chart using experimental Theremino MCA V4.5 software.
Because the I-129 at 39.6 keV, and Pb-210 at 46.5 keV, have energy peaks so close together it can be difficult to tell them apart with a NAI scintillator. If they are present at the same time, the peak that shows will drift toward the 39.6 kev if more I-129 is present, and towards 46.5 keV if more Pb-210 is present.
(Click on charts to see larger version)
May 2013 (7% above average)
Nimbin update report on the 31 May 2013 – “I went out 6 times and took swabs of different surfaces of roughly the same size and grit content, and each time I got between 2.5uSv/h 5.5uSv/h. Yesterday & today seems more like 0.5 to 2.5uSv/h. This is so not fun….”
Nimbin update on the 22nd Alert Level detection 24.05.2013 – ” ….and here’s the chart – http://youtu.be/j18DbxD5Oys I live on the rim of a very large caldera and I suspect that the radon responsible for these events is forced out of the ground right here at times of high rainfall, when the fractures in the strata are inundated with water. Often the mountain that is my back yard is under mist and I suspect that mist accumulates radon progeny which is then rained out. Onto my bloody vegetable garden!”
Sydney 23.05.2013, “My 2 counters are now showing 0.20uSv/h. It’s now 23/5/2013 22:19 Sydney Time. This is a bit higher than usual. Yesterday, I got some rain and then checked my wet clothes for radiation with the soeks couter, no radiation above background could be found. ”
Caloundra 22nd May 2013, Rained this evening, so I did a rain swab test, 0.65 uSv/hr. Longer testing with a sensitive Geiger counter showed the normal decay of Radon daughters in the washout.
Alert Nimbin monitoring station 22 May 2013. “Very high radon washout event currently in the Nimbin Valley. About 40 minutes ago, as I was leaving to drive to town for some supplies, I took a rain sample from the bonnet of my car (small sedan) using a cotton swab. When I returned home 25 minutes later I put the swab under my LND 7317 geiger counter and got 3974 counts in the first minute. That’s basically 10uSv/h! I’m logging it’s decay now….”
Note: Large Radon washout events can be very localized, just because it is happening in one location does not mean it is happening at yours.
Scintillator rain swabs test chart, for the 2nd and 11th May alert level rain event, at Nimbin Australia. It appears to be another very large Radon washout. The levels of Lead Pb-210 and Beryllium Be7 detected in these rain swabs, is much less than the Nimbin late January and early February 2013 rain swabs.
Caloundra 14th May 2013, Rained this morning, so I did a rain swab test, 0.69 uSv/hr. Longer testing with a sensitive Geiger counter showed the normal decay of Radon daughters in the washout.
Dunedin New Zealand13th May 2013. “Getting 1 picoCurie here at the moment with the window open – usually 0.4 or less …. something blowing around.” The Dunedin monitoring station has a Radon level detector.
Alert Nimbin monitoring station 11 May 2013. “Heavy downpours this morning have brought yet more radon progeny. A swab taken off the roof of the car (small sedan) this morning gave 2755cpm (LND7317) or ~6.8uSv/h. Ouch! Nimbin Update: After more than 500 minutes, here’s the decay chart – http://www.youtube.com/watch?v=7UHYRyx_52c&feature=youtu.be I’ll send this one to be analysed too…”
Note: The Nimbin monitoring station has multiple Geiger Counters to verify detections.
Alert Nimbin monitoring station 2nd May 2013 . “Radon and friends are back! A little shower just now left behind 1900cpm (LND7317) on a swab taken from the car windscreen…Average here with LND7317 is 27CPM.”
(Click on charts to see larger version)
April 2013 (9% above average)
Local Rain Test Chart 13th April 2013. Detected traces of Beryllium Be-7, Lead Pb-210, and Uranium U-235 in local rain test, Australia.
Caloundra 11.04.2013 Background levels here have dropped back to near normal averages in the last few days. Presently most of the air at my location in Australia has been coming from the east / south east, off the Pacific Ocean. In the last few months air flow has mainly been coming from the tropics, or off the Australian continent.
I used the Theremino Geiger Kit to test a rain swab I collected on Tuesday. It also showed a low radon washout level. I put it in long average charting to get this 13 hour chart. Then just took a screen shot with the built in chart capture feature built into this free software. The rain swab also started at a very low level of 0.20 uSv/hr.
Information on the Theremino Geiger kit can be found in the free Geiger use Guide, http://technologypals.com.au/wp-content/uploads/2012/03/Using-a-Geiger-Counter-to-test-food-for-Radioactive-Contamination.pdf Also, set up two live local monitoring stations using the Theremino Geiger Kit system. http://sccc.org.au/monitoring/sunshinecoast-monitoring-station.html
(Click on charts to see larger version)
March 2013 (32% above average)
Nimbin monitoring station 31th March 2013 . Just in, rain swab “1280 cpm (7317) off 2 meters corro after first shower of the day”
“Here is a chart of background counts for 31/3/13 clearly showing the spikes associated with the two major downpours that happened here late in the day. The data was generated on my background logger with one Si180g. My gs, my kit w/LND712, and my kit w/2xSBM20 recorded the same spikes only much less dramatically.” (Nimbin Chart, Y axis is in CPM)
Dunedin New Zealand March 15th 2013. Reported increase in Radon levels, “Radon levels here in NZ have migrated from 0.3-0.5 to 1.6 … picoCurioes per litre.”
(Click on charts to see larger version)
February 2013 (39% above average)
Report on the Alert level late January 2013 rain swab tests, February 9th 2013. Tested the Alert level +++ rain swabs collected at a private monitoring station on the east coast of northern New South Wales Australia. They were collected in late January, during a flooding rain event that had come down the east coast of Australia, from the tropics. Here is the test chart results of these rain swabs.
There were small traces of Uranium U-235 detected in this test, plus the signature of fallout isotope/isotopes, at around 492 keV.
Report at the time.
“Well, today I broke the record for high detections in rain samples. 2700cpm or ~10uSv/h (LND 7317) off an area the size of a Corolla bonnet. I’m logging its decay…”
This is the third test sample tested here, that found the signature of the fallout isotope/isotopes, at around 492 keV.
1. It was detected in a local soil sample last year, on the Sunshine Coast. Here is that test chart of that soil sample using PRA scintillator software. (In the test above Theremino MCA software was used.)
2. It was detected in the activated charcoal down pipe capture test.
3. Detected in the cloth rain swabs.
UPDATE to mystery isotope detection: Mystery isotope in the above test chart may be Beryllium Be-7 at 477 keV.
PavewayIII suggestion, “Can you try this sample again with a beta shield?”
I put a extra Aluminum beta shield directly in front of the Scintillator crystal, with these rain swabs behind it. This shifted the gamma peak to around 477 keV, which is the marker for Beryllium Be-7. Beryllium puts out 10% gamma to around 90% beta. Beryllium beta energies are 11% at 384 keV, and 89% at 862 keV. There must be an interaction of these beta energy’s with the scintillator crystal, that was creating the slight gamma peak shift to around 490 keV. Berylllium also has a 53 day half life.
Fukushima Corium, plus Liquid Nitrogen Injections, produces Beryllium Be-7 from what I have been reading. It can also be created by a solar coronal mass ejection hitting the earth’s atmosphere.
Important Note: Since the Mullumbimby late January and early February 2013 detection reports were posted, the owner of the Gamma Scout Geiger counter, reported his unit had developed a fault. That fault was investigated, and the unit has since been repaired. He now has a Gamma Scout Geiger Counter, and a Theremino Geiger kit set up with multiple SBM-20 Russian tubes. This means he can now cross check between units, to verify each unit is working correctly.
This brings into question the accuracy of his reported detected levels, for late January and early February 2013, at his location in Mullumbimby. Multiple Geiger counters at different locations, spread over a wide area, detected elevated local background radiation levels during this event. This was from the Sunshine Coast in Queensland, to the Northern New South Wales East Coast. The highest detections where on the Northern New South Wales East Coast. The other units used by people at different locations were all reported to be working correctly during this time, and still are. Most of these private monitoring stations have multiple Geiger Counters to cross check against, so they can verify detections.
Alert Mullumbimby 2nd, to 4th February 2013. (Note: Mullumbimby Geiger Counter reported as being faulty) Mullumbimby still has been getting alert level local background, with day averages at times above 0.40 uSv/hr, plus peaks over 1.20 uSv/hr. Normal background is generally around 0.12 uSv/hr, 24 hour charts for the 2nd, 3rd, and 4th of February.
January 2013 (52% above average)
Alert Mullumbimby 28th to 31st January 2013. (Note: Mullumbimby Geiger Counter reported as being faulty.) Mullumbimby had very elevated local background, with a day average of 0.403 uSv/hr, plus peaks over 0.70 uSv/hr. Normal background is generally around 0.12 uSv/hr. 28th chart, 30th chart, 31st chart
Caloundra 28th January 2013. Yesterday the 27th set a day average detection record for this location. It was 0.213 uSv/hr, or 113% above average. The highest day average ever recorded here! From 12pm to 8am on the morning of the 28th, the local average background for that period was 0.235 uSv/hr, or 135% above average, which would place it into the next alert level.
Alert Nimbin monitoring station 27th January 2013 . Just in, rain swab off bonnet of a small car.
“Well, today I broke the record for high detections in rain samples. 2700cpm or ~10uSv/h (LND 7317) off an area the size of a Corolla bonnet. I’m logging its decay…” Photo
Caloundra 26th January 2013. Just went up another alert level, to 84% above 4 year local background average, see January 2013 day chart below. Here is the 24hr chart.
Alert Nimbin Monitoring station report 25th to 26 January 2013. Alarming background here this morning. Gamma scout alarm set at 1uSv/h has been off a few times with visual readings above 1.2uSv/h. Just checked the log and background has been steadily rising since the wee hours and is now averaging over 0.3uSv/h. Chart for 25th to 27th
Alert Mullumbimby 25th, 26th, 27th, January 2013. (Note: Mullumbimby Geiger Counter reported as being faulty.) January 26th, more rain and high readings on the Gamma Scout – peaks at over 0.9 uSv/h. house is dry, temperature low twenties. Chart of 25th to 26th, Chart of 26th to 27th.
Alert Mullumbimby 24th January 2013. (Note: Mullumbimby Geiger Counter reported as being faulty.) I became aware of sharply increased readings with the alarm of the Gamma Scout (set at 0.6 micro Sv/h) going off repeatedly. I observed on the display values of 1.3 micro Sv/h. In light rain to medium showers background radiation was increasing setting off the alarm repeatedly in the evening with values increasing. Chart of event
Rain Alert issued 22nd January 2013. These rain swab test reports could be very high Radon daughter washout events, even so, at these multi uSv/hr levels of radiation being detected, it maybe advisable to keep children and pets, out of the rain. Rain washout events like this can be very localized. Just because happening one location, doesn’t mean it will occur at your location. Radon wash out decays quickly, most of it has decayed after an hour. Because these are such large multi uSv/hr detections, it will take hours before it decays to near normal background levels.
Until further tests are done, there is no way of knowing if other longer lived isotopes are present. If you, a child or a pet gets wet, it would be advisable to have a shower as soon as possible, and wash hair and body thoroughly. Also, just after an event like this, it would be wise to wash any vegetables, herbs and fruit well, if picked from your garden. If you use tank water, it is suggested that the water passes through a good carbon, or better, type water filter before use. We haven’t seen any studies on the heath effects of being exposed to large Radon washout events. It is only a suggestion to take these precautions.
Why is the east coast of Northern New South Wales is getting such large radon washout events? We have some theories, but don’t really know. Here is a link to more information on Radon. http://hyperphysics.phy-astr.gsu.edu/hbase/nuclear/radon.html
Alert Nimbin Monitoring station report 21th January 2013. I’ve taken about 5 swabs in the last 24hrs and detected between 1.7 and 2.7uSv/h in all, accept for the swab I took about 5 mins ago on which I have detected ~1600cpm or ~6uSv/h using an LND 7317 pancake. HOT! Just took another swab – 6.9uSv/h….
Alert Nimbin Monitoring station report 19th January 2013. Started raining here this afternoon, so not long after it started I took a swab, 1xCorolla windscreen = 2.2uSv/h.
Kapiti gaigakaunta Monitoring Station North Island New Zealand. 15th January 2013, a significant increase in local background detected, see chart screen shot.
Alert Nimbin Monitoring station report 14th January 2013. More than 3uSv/h off the car this morning (LND7317) after a light rain shower.
Dunedin South Island New Zealand 9th Janaury 2013. In New Zealand a discrepancy in radon ionisation meters and daughter product collectors has indicated the presence of unknown radio-isotopes in the air in an estimated concentration of around 1 picoCuries per litre. This anomaly has been recorded upon gamma recorders.
Four year local background radiation levels recorded from 2007 to 2011. ( 4 year average 0.10 uSv/hr )
Radiation Cloud detected over Australia 8th January 2012
Radiation Cloud detected over South Island of New Zealand 29th January 2012
Radiation Cloud detected over Melbourne Australia 26th February 2012
Disclaimer: This is an amateur volunteer run service. Human error can provide incorrect information, and equipment malfunction can produce false readings. Do not rely on, or take action upon information presented on this web site, without further research. Views expressed in the pages or images on the SCCC Inc., site maybe the personal opinions of the relevant writers, and are not necessarily representative of those of SCCC Inc.